Device for telegraphing under water.



` -F. P.- HSHER 'at H. DEHART,

DEVICE FOR TEL/ERAPHING UNDERWATER.. APPLICATION mio Mn. u. |916.

$1,233,211, Patented Jul-y 10, 1917.v

6 5 4 g 6 I I zo J5 FRANK P. FIS-HER AND HUGH DEHART, OIE'v RADFORD, VIRGINIA.

DEVICE FOR TELEGRAPHING UNDER WATER.

' Specication of Letters Patent.

Patented July 10, 1917.

`Application led January 17, 1916. Serial N o. 72,478.

T 0 all whom t may concern Be it known'that we, FRANK P. FISHER and HUGH DEHART both citizens of the United States, residing at Radford, in the Acounty of Montgomery, State of Virginia, have invented a new'and useful Device for Telegraphing Under. Water; and we do hereby ,declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

vThe present invention relates to a device for telegraphing under water, and has for its object to provide a device of. this character which embodies novel vfeatures of constructionvwh-ereby messages can be transmitted through a body of water asa carrying medium without the necessity of a wire or metallic connection between the sending and receiving stations.

Further objects of the invention are to provide an under-sea telegraph which is simple and compact in its construction, which is easily operated, and which within certain limits will enable communication to be established with a submarine boat.

With these and other objects in View, the invention consists in certain novel combinations and arrangements of the parts asA will more fully appear as the description proceeds, the novel features thereof being pointed' out in the appended claim.

For a full understanding of the invention, reference is to' be had to the following description and accompanying drawing, in which The igure is a diagrammatic view of an under-sea telegraph constructed in accordance with the invention.

Corresponding and like parts are referred to in the following description and indicated in all the Views of the drawing by the same reference characters.

Referring to the drawings, and specifically describing one of the stations, it being understood that both the sending and receiving stations arefthe same, the reference character A designates a source of electrical supply, and 1 a switch for controlling the same. A wire 2 leads from one of the terminals of the switch 1 to one of the low tension terminals 3 of a telephone induction minal of the said key being connected by a wire 7 to a post 8 having a vibrator contact screw 9 threaded thereon. A vibrator 10 extends transversely across one end of the indyction coil 4 so as to be attracted toward the core of the coil 4 when the coil is energized; This vibrator 1() is mounted upon a post 11 which is connected by a wire 12 to the opposite primary terminal 3 of the f induction coil. The contact scre'w 9 is adjusted to obtain a rapid action of the vibrator, and with this construction it will be obvious that when the telegraph key 6 is manipulated to close the circuit the v1 brator 10 will be actuated.

The secondary terminals 13 of the induction coil are connected by wires 14 toend terminals 15 of a double throw switch B. The switch blades 16 are mounted upon posts 17 anduadapted to be swung into en gagement with the end contacts 15 at one side of the switch or the end contacts 18 at the opposite side of the switch. The middlel posts 17 are connected by the wires 19 to' carbon electrodes 20 which are submerged in the water and arranged a suitable dis'- tance apart. In practice it has been found that about twenty'feet apart is the proper distance to set the electrodes for an appara-A tus having a radius of from live hundred to one thousand feet. The other set of end terminals 18 of the double throw switch B are connected by the wires 21 and board 22 to a telephone receiving device 23 adapted ,to be itted upon the head of the operator with the receivers 23a arranged over the ears.

Vhen sending a message the switch blades 16 of the double throw switch B are'swung into engagement with the contact posts 15 and the telegraph key 6 manipulated in the proper manner. Each time the key 6 closes the circuit a high tension current is produced in the secondary coil of the induction coil, the terminals of said secondary coil being connected to the carbon electrodes 20. This results in the transmission of a certain form of energy from the zone of the carbon electrodes 20, said energy radiating in all directions so as to act upon the carbon electrodes 20 of a receiving station, which are within the effective radius of the sending station. At the receiving station the switch blades 16 are swung into engagement with the end posts 18 so that the action of the energy from the sending station upon the electrodes 20 of the receiving station will between the two stations. The device could.

l0 be used for establishing communication between.` tw submarine boats, or between 'a submarine boat. and the' surface of the water,

and might be very useful in locating aA sunken or disabled submarine Vessel.

we claim as new and desire to secure by Letters Patent, is

A. device for telegra'phing under Water, including a pair. of spaced and submerged electrodes, a double-throw switch including Having thus described the invention, whatv spaced' switch blades and two sets 'of contacts, either set of the contacts being adapted to be engaged by the switch blades, wires connecting the switch blades to the' respective submerged electrodes, an induction coil having the secondary terminals thereof connected to one set of switch contacts, a telegraph key controlling the primary circuitv of the induction coil, 'and a telephone rel ceiver connected to the opposite set of switch contacts. i

In testimony whereof we have signed our of two subscribing witnesses.-

FRANK P. FISHER.A

HUGH DEHART.

names toA this specification in thepresence Witnesses:

J. H. CARPER, E. COOPER. 

